Playbooks · guides and ranked lists

Businesses worth opening a page for.

Guides and ranked lists for owners choosing a business to start. Each playbook answers the questions that come before any spending: who pays, what to charge, how big the obtainable market is in our estimates, and how to find the first ten customers.

Every business here starts from a public thread where buyers describe the problem themselves. Figures come from our own data and from the named public sources shown on each business page, with the assumptions written out. We do not name the people who posted. The business pages are free; a credit unlocks the business-plan prompt and the growth playbook for one idea. New playbooks are added as the catalog grows, and older ones are updated when the data changes.

Playbooks3
LatestOct 18, 2026

· Shortlist

Boring B2B business ideas that pay: 10 to start

Ten unglamorous B2B business ideas with real buyers: who signs the check, what they pay, the obtainable market in our estimates and how to win the first accounts.

  1. · Deep dive

    How to start a medical bill dispute business

    Who pays to dispute a medical bill they never agreed to, how a success fee works, the first customers to find, and the risks to plan for before you take a case.

  2. · Shortlist

    8 personal finance business ideas you can start

    Eight personal finance and consumer-rights business ideas from public money threads: who pays, how to price for a price-sensitive buyer, and the first ten customers.